新型对称T型支节加载双模双通带微带滤波器

提出了一种新型对称T型开路支节加载的双模双通带滤波器,并对其进行了奇偶模和双模谐振器耦合原理分析。该滤波器的两个通带分别由奇模和偶模产生,且具有3个传输零点,在-25 dB以下的高端阻带达5GHz,具有高选择性和宽阻带的特性,且滤波器的实测结果与仿真结果非常吻合。该双模滤波器与传统滤波器相比,在相同级数的情况下,尺寸减小近一半,在工程领域非常具有应用价值。

A novel Dual-mode dual-band microstrip filter loaded with symmetric T-shape subs

A novel dual-mode dual-band bandpass microstrip filter loaded with symmetric T-shape subs is proposed in this paper, and analyze the even-odd mode and the coupling principle of dual-resonator. The two passbands of the filter are produced by the odd-mode resonant frequencies and the even-mode resonant frequencies respectively, which can obtain three transmission zeros, and the upper-stopband less than -25 dB attenuation is up to 5 GHz. So the filter has high selectivity and broad stopband. The measured results show good agreement with the simulated results. Compared with the conventional microstrip filters, the proposed dual-mode filter can significantly reduce the size of 50% int the same order. So it has important application value.